Renesas H8S Family Hardware Manual page 921

SETUP token reception

Receive 8-byte command

data in EP0s

to be processed by

application?

Set setup command

reception complete flag

(IFR0.SETUP TS = 1)

To data stage

Notes: 1. In the setup stage, the application analyzes command data from the host requiring processing by

the application, and determines the subsequent processing (for example, data stage direction, etc.).

2. When the transfer direction is control-out, the EP0i transfer request interrupt required in the status

stage should be enabled here. When the transfer direction is control-in, this interrupt is not required

and should be disabled.

USB function

processing by

Interrupt request

Figure 22.10 Setup Stage Operation

Section 22 USB Function Module (USB)

Clear SETUP TS flag

(IFR0.SETUP TS = 0)

Clear EP0i FIFO (FCLR.EP0iCLR = 1)

Clear EP0o FIFO (FCLR.EP0oCLR = 1)

Read 8-byte data from EP0s

Decode command data

Determine data stage direction*

Write 1 to EP0s read complete bit

(TRG.EP0s RDFN = 1)

To control-in

To control-out

Rev. 1.00 Mar. 12, 2008 Page 873 of 1178

REJ09B0403-0100